DS21Q44 Datasheet (Dallas Semiconducotr)

DS21Q44, Enhanced QUAD E1 FRAMER

The DS21Q44 E1 is an enhanced version of the DS21Q43 Quad E1 Framer.

The DS21Q44 contains four framers that are configured and read through a common microprocessor compatible parallel port.

Each framer consists of a receive framer, receive elastic store, transmit formatter and transmit elastic store

DS21Q44 Features

* Four E1 (CEPT or PCM-30) /ISDN-PRI framing transceivers All four framers are fully independent; transmit and receive sections of each framer are fully independent Frames to FAS, CAS, CCS, and CRC4 formats Each of the four framers contain dual two

* frame elastic store slip buffers that can co